body {
    margin: 0;
    padding: 0;

}

#box1 {
    height: 100vh;
    width: 100%;
    background-image: url(img/1.jpg);
    background-size: cover;
    display: table;
    background-attachment: fixed;
}

#box2 {
    height: 100vh;
    width: 100%;
    background-image: url(img/2.jpg);
    background-size: cover;
    display: table;
    background-attachment: fixed;
}

#box3 {
    height: 100vh;
    width: 100%;
    background-image: url(img/3.jpg);
    background-size: cover;
    display: table;
    background-attachment: fixed;
}

#box4 {
    height: 100vh;
    width: 100%;
    background-image: url(img/4.jpg);
    background-size: cover;
    display: table;
    background-attachment: fixed;
}

h1 {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 50px;
    color: white;
    margin: 0;
    text-align: center;
    display: table-cell;
    vertical-align: middle;
}